<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <div id="main" style="width: 800px; height: 400px"></div>
    </el-card>
  </div>
</template>

<script>
//坑：用import引入会报错，或者用低版本
const echarts = require("echarts");
import _ from "lodash";
export default {
  data() {
    return {
      options: {
        title: {
          text: "用户来源",
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3",
            },
          },
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: "value",
          },
        ],
      },
      reportList: [],
    };
  },
  methods: {},
  created() {},
  //在dom加载完后，才能渲染，不能再created写
  async mounted() {
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"));

    //获取表格数据
    let { data: res } = await this.$http.get("reports/type/1");
    console.log(res);
    if (res.meta.status !== 200) return this.$message.error("获取数据失败");
    this.reportList = res.data;

    // 指定图表的配置项和数据
    //lodash合并方法
    let option = _.merge(this.reportList,this.options)

    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(option);
  },
};
</script>

<style lang="less" socped>
</style>